Coil arrangement having two coils

Abstract

A cod arrangement, in particular for a position sensor, has a first coil ( 1 ) and a second coil ( 2 ) which are electrically connected to one another and disposed substantially coaxially relative to one another. The first coil ( 1 ) has a winding density that increases in the longitudinal direction (X) of the coil arrangement, and the second coil ( 2 ) has a winding density that decreases in the longitudinal direction (X) of the coil arrangement. In addition, the invention relates to a position sensor having such a coil arrangement and a production method for such a coil arrangement.

1 - 13 . (canceled) 
     
     
         14 . A coil arrangement for a position sensor, the coil arrangement comprising:
 a first coil ( 1 ),   a second coil ( 2 ),   the first coil ( 1 ) and the second coil ( 2 ) being electrically connected to one another and being disposed substantially coaxially relative to one another,   the first coil ( 1 ) having a winding density that increases in a longitudinal direction (X) of the coil arrangement, and   the second coil ( 2 ) having a winding density that decreases in the longitudinal direction (X) of the coil arrangement.   
     
     
         15 . The coil arrangement according to  claim 14 , wherein the winding density of the first coil ( 1 ) increases in the longitudinal direction of the coil arrangement substantially to a same extent that the winding density of the second coil ( 2 ) decreases. 
     
     
         16 . The coil arrangement according to  claim 14 , wherein the winding densities of the first coil and the second coil ( 2 ) change in a linear manner. 
     
     
         17 . The coil arrangement according to  claim 14 , wherein the winding density of the first coil and the second coil ( 2 ) change abruptly in sections. 
     
     
         18 . The coil arrangement according to  claim 14 , wherein the winding density of the first coil and the second coil ( 1 ,  2 ) change in a linear manner, in a first longitudinal section ( 4   a ), and are constant, in a second longitudinal section ( 4   b ) that adjoins the first longitudinal section ( 4   a ), and change in a linear manner, in a third longitudinal section ( 4   c ) that adjoins the second longitudinal section. 
     
     
         19 . The coil arrangement according to  claim 14 , wherein the first coil and the second coil ( 2 ) are electrically connected in series, one directly after the other, with a measuring tap ( 6 ) located between the first coil and the second coil ( 1 ,  2 ). 
     
     
         20 . The coil arrangement according to  claim 14 , wherein the first coil and the second coil ( 1 ,  2 ) are each connected in series with a comparator resistor ( 7 ), and each of the first coil and the second coil ( 1 ,  2 ), with the comparator resistor ( 7 ) connected in series, forms a leg of a Wheatstone bridge circuit, and
 a measuring tap ( 6 ) is arranged between each of the first coil and the second coil ( 1 ,  2 ) and the comparator resistor ( 7 ) connected in series thereto.   
     
     
         21 . The coil arrangement according to  claim 14 , wherein a magnetically conductive housing ( 5 ) is provided, within which the first coil and the second coil ( 1 ,  2 ) are disposed, to magnetically influence magnetic flux within the coil arrangement. 
     
     
         22 . A coil arrangement ( 1 ,  2 ) in combination with a position sensor, the coil arrangement comprising:
 a first coil ( 1 ),   a second coil ( 2 ),   the first coil ( 1 ) and the second coil ( 2 ) being electrically connected to one another and being disposed substantially coaxially relative to one another,   the first coil ( 1 ) having a winding density that increases in a longitudinal direction (X) of the coil arrangement,   the second coil ( 2 ) having a winding density that decreases in the longitudinal direction (X) of the coil arrangement,   a magnetically conductive transducer element ( 3 ) being a position feedback transducer and being disposed with respect to the coil arrangement to move along the longitudinal direction (X) of the coil arrangement.   
     
     
         23 . The position sensor according to  claim 22 , wherein the coil arrangement ( 1 ,  2 ) is designed as circular segments, along the longitudinal direction (X), and the transducer element ( 3 ) is movable at least in circular segments along the coil arrangement ( 1 ,  2 ), as an angle-position transducer so that the position sensor forms an angle-position sensor. 
     
     
         24 . The position sensor according to  claim 22 , wherein the coil arrangement ( 1 ,  2 ) is straight, in the longitudinal direction, and the transducer element is movable, in a linear manner, along the longitudinal axis of the coil arrangement ( 1 ,  2 ) as a linear position feedback transducer so that the position sensor forms a linear position sensor. 
     
     
         25 . A method for producing a coil arrangement for a position sensor which has a first coil ( 1 ) and a second coil ( 2 ), which are electrically connected to one another and disposed substantially coaxially relative to one another, the first coil ( 1 ) has a winding density that increases in a longitudinal direction (X) of the coil arrangement, and the second coil ( 2 ) has a winding density that decreases in the longitudinal direction (X) of the coil arrangement, the method comprising:
 winding the first coil ( 1 ) as a radially inner coil   winding the second coil ( 2 ) as a radially outer coil, and   electrically connecting the first coil ( 1 ) to the second coil ( 2 ).   
     
     
         26 . The method according to  claim 14 , further comprising winding of the second coil ( 2 ) such that opposite ends of winding layers of the first coil and the second coil ( 1 ,  2 ) are directly in contact with one another.